The distinction you are drawing is a useful one, and I want to make sure the vocabulary is clear for anyone following this thread who is earlier in the learning curve.
Debt-to-total-assets is the share of a REIT's assets that are funded by borrowing rather than by equity. If a REIT owns $100 million in properties and carries $35 million in debt, that ratio is 35 percent. Interest coverage ratio measures how many times over the REIT's income can pay its interest bill. A 7.2x ratio means income is 7.2 times the interest owed, which leaves a lot of room before a rough year causes a missed payment.
Your core point holds up: a strong balance sheet acts as a buffer. Sector tailwinds can lift a REIT's revenues, but if leverage is high and a leasing year softens, the interest bill does not soften with it. The dividend gets cut before the lender does.
One thing worth adding for anyone reading this as a framework: balance sheet quality and sector thesis are not independent inputs. Some sectors structurally carry higher leverage because their cash flows are more predictable, so a 50 percent ratio in net-lease retail reads differently than the same ratio in office. The ratio means more when you read it alongside the stability of the underlying cash flow, not just against a universal threshold.
I am not certain there is a settled answer on the exact weighting, and I would treat any specific formula with skepticism. This is a starting point for your own research rather than a conclusion.
For anyone at the early stages of thinking through REIT selection, the Guide tab on the Public REITs strategy page in Rena covers how to think about sector tilts alongside fundamentals.
When you are comparing names in the same sector, are you looking at leverage on a snapshot basis or tracking how it has moved over a few reporting periods?